Public bug reported: On the new AMD Ryzen 3000 series CPUs, there is an issue with systemd preventing the boot process from completing. This issue does not affect the older systemd version in 18.04, but affects the 19.04 version.
Here is a screenshot showing what happens: https://www.phoronix.net/image.php?id=ryzen-3700x-3900x-linux&image=amd_zen2_14_show I am currently testing a patch to systemd, derived from this pull request: https://github.com/systemd/systemd/pull/12536 This is a high severity issue, as I do not believe there is no potential workaround without either a firmware update or an ISO respin. I have attached a rebase of the potential patch on the current 19.04 version of systemd for reference. I will provide more details after testing. ** Affects: systemd (Ubuntu) Importance: Undecided Status: New ** Tags: patch ** Patch added: "Rebase of https://github.com/systemd/systemd/pull/12536"; https://bugs.launchpad.net/bugs/1835809/+attachment/5275667/+files/rdrand-workaround-on-amd.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1835809 Title: AMD Ryzen 3000 series fails to boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1835809/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
